Ahied, M., Fikriyah, A., Rosidi, I., & Muharrami, L. K. (2020). Activating students’ prior knowledge of basic science concepts on animal and human system organ. Biosfer: Jurnal Pendidikan Biologi, 13(2), 280-291. https://doi.org/10.21009/biosferjpb.v13n2.280-291